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Charra [1.4K]
3 years ago
10

Solve the system of equations by using the substitution method X+Y=3 X=2Y

Mathematics
1 answer:
Marrrta [24]3 years ago
6 0

Answer:

If you're asking me to solve for Y, y = 1.

Step-by-step explanation:

Simple. If x is 2x y and y = 1, 2 x 1 is 2 plus y being equal to 1 will give you a total of 3. Hope this helped.

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1. The perimeter of a piece of paper is 18 cm.
OlgaM077 [116]

Answer:

a) length = 3 and width = 6

Area of the rectangle = 3 × 6 = 18 cm²

b)  length = 7 and width = 2

Area of the rectangle = 7 × 2 = 14 cm²

c)  length = 5 and width = 4

Area of the rectangle = 5× 4 = 20 cm²

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given perimeter of the paper = 18 cm

we know that the paper has a rectangle shape

The perimeter of the rectangle = 18 cm

 2( l + w ) = 18

a)

we choose length = 3 and width = 6

The perimeter of the rectangle = 2( 3+6) = 18 cm

Area of the rectangle = 3 × 6 = 18 cm²

b)

we choose length = 7 and width = 2

The perimeter of the rectangle = 2( 7+2) = 18 cm

Area of the rectangle = 7 × 2 = 14 cm²

c)

we choose length = 5 and width = 4

The perimeter of the rectangle = 2( 5+4) = 18 cm

Area of the rectangle = 5× 4 = 20 cm²

3 0
3 years ago
A square dance floor has a perimeter of 120 yards. What is the length of a diagonal of the dance floor?
Crazy boy [7]

Answer:

Hey!

Your answer is C.42.4yd

Step-by-step explanation:

There are 2 ways you can work this on out...

1. Using Pythagoras Theorem...

= 30^2 + 30^2 = 1,800 (30^2=900 so you've added 2 of those to make 1,800)

= SQUARE ROOT THE ANSWER OF 1,800

\sqrt{x} 1,800= 42.42640687119285‬

TO GET A MORE PRECISE ANSWER WE ROUND IT UP TO 1 decimal place

= 42.4 yd is the diagonal length of the dance floor!!

HOPE THIS HELPS!!

6 0
3 years ago
Question 3 Solve for m. 4 over 3 m equals 4
Lorico [155]

Answer:

m = 3

Step-by-step explanation:

\frac{4}{3} m = 4 \\ divide \: both \: sides \: by \:  \frac{4}{3}  \\  \\ m = 3

3 0
3 years ago
Need fast in plz help me quick
Eva8 [605]
6)x-7+10 7)3+x+1 8)8x-16 9)x/2-9
5 0
3 years ago
Read 2 more answers
In 2 + In 8 - In 4<br> In 4<br> In 6<br> In 64<br> DONE
Alex

Answer:

ln 4

Step-by-step explanation:

plus(+) will become times and minus(-)will become divide. Combine all together as all are in terms of ln

ln (2x8)/4

=ln 4

7 0
3 years ago
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